/*
* Copyright (c) 2015 Cossack Labs Limited
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

#import <objcthemis/scell.h>

@implementation TSCell {
    NSMutableData *_key;
}

- (nullable instancetype)initWithKey:(NSData *)key {
    self = [super init];
    if (self) {
        if (!key || [key length] == 0) {
            return nil;
        }
        _key = [[NSMutableData alloc] initWithData:key];
    }
    return self;
}

- (void)dealloc
{
    // Wipe the sensitive encryption key from memory when Secure Cell
    // is deallocated and can no longer be used.
    [_key resetBytesInRange:NSMakeRange(0, _key.length)];
    [_key setLength:0];
}

@end
